The patch titled
Subject: mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
has been added to the -mm tree. Its filename is
mm-release-a-semaphore-in-get_vaddr_frames.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-release-a-semaphore-in-get_vaddr_frames.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-release-a-semaphore-in-get_vaddr_frames.patch
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------------------------------------------------------
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Subject: mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
A semaphore is acquired before this check, so we must release it before
leaving.
Link: http://lkml.kernel.org/r/20171211211009.4971-1-christophe.jaillet@xxxxxxxxxx
Fixes: b7f0554a56f2 ("mm: fail get_vaddr_frames() for filesystem-dax mappings")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: David Sterba <dsterba@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/frame_vector.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/frame_vector.c~mm-release-a-semaphore-in-get_vaddr_frames mm/frame_vector.c
--- a/mm/frame_vector.c~mm-release-a-semaphore-in-get_vaddr_frames
+++ a/mm/frame_vector.c
@@ -62,8 +62,10 @@ int get_vaddr_frames(unsigned long start
* get_user_pages_longterm() and disallow it for filesystem-dax
* mappings.
*/
- if (vma_is_fsdax(vma))
- return -EOPNOTSUPP;
+ if (vma_is_fsdax(vma)) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) {
vec->got_ref = true;
_
Patches currently in -mm which might be from christophe.jaillet@xxxxxxxxxx are
mm-release-a-semaphore-in-get_vaddr_frames.patch
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